ForkDelta Backend

This repository hosts the source code of ForkDelta backend. The backend provides off-chain orderbook functionality and an API to get a filtered view of Ethereum blockchain events on an EtherDelta-like contract.

Best way to learn about a system is to read the source code. Start with a look at docker-compose.yml.

API

For information and documentation on ForkDelta's API, look here: https://github.com/forkdelta/backend-replacement/tree/master/docs/api

Developing

Setting up a development environment

Requirements:

• Some sort of shell environment
• A reasonably recent version of Docker (>= 17.06, ideally 17.12)
• docker-compose (= 1.18)
• Basic familiarity with Docker keywords: image, container (https://docs.docker.com/get-started/#docker-concepts)

Setup:

1. Clone the repo (git clone https://github.com/forkdelta/backend-replacement.git)
2. Navigate to the root of the working copy, where the README file is.
3. Copy default.env file to .env in root.
4. Uncomment the COMPOSE_FILE= line in .env to enable mounting of working copy code into the containers.
5. Build a Docker image containing our backend code: docker-compose build contract_observer
6. Create the database and migrate it to the latest schema: docker-compose run contract_observer alembic upgrade head
7. Run the backend systems: docker-compose up. You can shut everything down with Ctrl+C at any time.

Tips:

• There are multiple containers running our backend code: contract_observer, etherdelta_observer, websocket_server.
• Running docker-compose build <service-name> for any of the above builds the same image.
• docker-compose build contract_observer builds an image, copying the code and installing Python libraries in our dependencies. You have to rebuild any time the dependencies change; however, in development, code in the working copy is mounted into the container, so it's enough to restart the container (with docker-compose restart <service-name>) to apply changes for a given service.
• You can inspect the list of currently running containers with docker-compose ps.

Contributors

• Arseniy Ivanov
• Jonathon Dunford

License

Copyright (C) 2018, Arseniy Ivanov and ForkDelta Contributors

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

See the full license.